Spring-jack.



0. M. GLUNT.

SPRING JACK.

APPLICATION FILED AUG. 2a, 1913.

1,126,193, Patented Jan.26,1915.

I OMe/MG/L/Mf by -A//l UNITED STATES OMER GLUNT, OF RUTHERFORD, NEW JERSEY, ASSIGINOR T WESTERN ELECTRIC COMPANY, OF YORK, N. Y., A CORPORATION OF ILLINOIS.

SPRING-JACK.

To all whom it may concern:

Be it known that I, OMER M. GLUNT, a

citizen of the United. States, residing at Rutherford, in the county of Bergen and State of New Jersey, have invented a certainnew and useful Imp'rovement in Spring- ,Ement thereof and hence to maintain the con-" Jacks, of which the following is a full, clear, concise, and exact description. 1

This invention relates to a type of elec trical switch commonly known as a springjack, which jack is adapted to cooperate. with a plug in order to detachably connect aplurality of electrical conductors associated with the plug with corresponding conductors associated with the jack. Jacks of this type .are commonly employed in-tele hone switchboards in which a large numer of jacks are mounted in close proximity, making it desirable that the jack structure be as compact as is consistent with the size of the ordinary switchboard plug, and be sufficiently rigid to prevent lateral displacebe rigid, compact and which may be con-v Specification. of Letters, Patent.

' ture therein by means of which the jack 'is adapted-to be attached to the switchboard.

Secured to the plate 2, preferably by means of an electrically welded joint, is the jack frame 4.. This frame 4 is punched from a single 'piece of sheet metal which is longitudinally bent along its center line to form two side portions 5 and 6, which side portions are at substantially right angles to each other. The side-portion 6 is provided with a cut-away portion 7 thus forming a lug 8 which is welded to the plate 2 and the side portion 4, as is more clearly shown in Fig. 2, is provided with a downwardl 3 preferably by welding. As more clearly shown in Fig. 2, the cut-away portion 7 is adjacent the lug 3 so that when an ordinary screw is passed through the aperture in the lug 3, the head of the screw will clear the jack frame, whereby the jack may be conveniently-attached to and removed from the switchboard with the ordinary screw-driver. The downwardly offset portion 9 of the side portion 5 provides a clearance space for the end of the plug, and the opening 24 in such end portion 9 makes it impossible for the tip of the plug to contact with the jack frame. Mounted on the side piece 5 of the angular veniently ttached tg the dinary switch-x'frame 4: is a series Of contact springs 10., 11

board. p -With these objects in' view a frame isprovided, which frame carries both the Jack I sleeve and the contact springs. This frame 1 is a box-like structure having two sides at right angles to each other and an endpiece attachedto said sides at right angles thereto. The jack sleeve is mounted on the end portion of the frame and the contact springs are mounted on the side portion.

The invention will be more completely understood by referring to the accompanying drawings wherein- Figure 1- is a side elevation of one form of springack embodying the invention;

Fig.2 is a perspective viewof the jack shownin Fig. 1; and Figs. 3 and 4 are erspective views of modified form of ack frames embodying the invention.

Referring first to the form of the invention shown in Figs. land 2, the jack comprises a sleeve 1 which is secured at right angles to a sheet metal plate 2. The plate 2 is provided with a lug 3 having an aperand 12. These contact springs are secured to the side piece 5 by means of screws 13 which pass through the rear ends of the contact springs, and through a plurality of strips of insulating material 14 which serve to insulate the contact springs from each other and from the jack frame. The screws 13 are insulated from the contact springs by sleeves of insulating material, not shown. It is obvious that the contact springs may be mounted on either of the side pieces 5 or 6, and that the jack may be mounted in the switchboardwith either of the side portions disposed vertically, depending upon Whether or not it is desirable to mount the contact springs in a vertical or a horizontal position.

Cooperating with the contact spring 12 is a'contact piece 15 which is directly connected to the frame of the jack. The contact piece 12 also carries an insulating piece 16, which serves to insulate such spring from contact spring 11, and said contact piece 12 is also provided with a bent end 17 which is Patented Jan. 26, 1915. Application filed'nug ust 28, 1913. Serial No. 787,129.

y offset portlon 9 WlllCll is secured to the plate adapted to cooperate with a plug when it is inserted in the jack.

In the modified form of the invention shown in Fig. 3, the sleeve passes through the plate 2 and is riveted to the end 18 of the jack frame. 21 is punched from a single piece of sheet metal, the end 23 thereof being provided with an integral metal lug 22, the plate 2 being omitted. The sleeve 1 of the jack is riveted directly to the end 23 of the jack frame. The contact springs are mounted upon jacks, in Figs. 3 and I in the same manner as they are mounted upon the jack disclosed in Figs. 1 and 2.

In all of the various forms of jacks disclosed herein the jack frames are formed from a substantially rectangular-sheet metal blank, which blank is bent along its longitudinal center line providing two side portions at right angles to each other so that a cross-section of the frame is substantially L- shaped Either secured to the end of the side portions by welding or riveting, or integral therewith, is an end portion, which .end portion is at right angles to both of the side portions. r

' By virtue of this construction, the frame is made very rigid and the contact springs and sleeve of the ack which are cai'r ied by the frame are maintained in alinement.

The construction is compact, strong and easy to assemble, and as the parts, with the exception of the sleeve, are all of sheet metal, the jack can be cheaply manufactured in large quantities.

I claim:

1. In a spring jack, a punched frame comprising an end portion and two side portions disposed at right angles to each othe'r and to said endportion and contact members carried by said end and side portions.

2. In a spring jack, a punched sheet metal frame comprising an end portion and two side portions disposed at right angles to each other and to said end. portion, contact springs mounted upon one of said side portions, a sleevemember carried by said end portion and means carried by said frame for securing the jack to a switchboard. I

3. In a spring jack, a punched sheet metal frame comprising an end portion and two angularly disposed side portions, contact members carried by said end and side portions and an attaching lug punched out of one of said side portions and extending at right angles thereto.

4. In a sprlng ack, a sheet metal frame comprising an end portion and -angularly 70 disposed side portions extending at right angles to said end portion, one of said side portions being provided with an opening adjacent the end portion, spring contact members mounted upon one of said side portions with their ends adjacent said opening anda mounting lug for said jack punched out 0 one of said side portions.

In witness whereof, I hereunto subscribe my name this 23rd day of August A. D., 80 1913. 

